[mythtv-users] 0.32 Slave Backend DVB-S2 Channel Scan Fail

[Ken Smith]

Klaas de Waal wrote:
>
>
> On Wed, 1 Jun 2022 at 17:07, John <jksjdevelop at gmail.com 
> <mailto:jksjdevelop at gmail.com>> wrote:
>
>     On 01/06/2022 14:26, Ken Smith via mythtv-users wrote:
>     > Hi All,
>     >
>     > I've just moved 2 DVBS2/DVBT2 combo cards (HVR5525) from my Master
>     > backend to a newly built Slave backend. I've deleted those devices
>     > from the Master and the database is all sorted. I can get the 2
>     DVBT2
>     > adaptors in the slave to channel scan but I must be missing
>     something
>     > as the DVBS2 adaptors fail. I can get a successful DVBS2 scan with
>     > both adaptors using dvbv5-scan. So it must be something
>     connected with
>     > my myth installation or my configuration.
>     >
>     > The adaptors are set up in Capture Cards on the Slave with the
>     LNB set
>     > to Universal Europe. I'm in the UK using Astra 28. In Video
>     Sources in
>     > the Master I have an initial frequency set of 11428000Khz, which is
>     > the Freesat UK frequency. Other settings are default. Is there some
>     > subtlety about the Slave config I've missed?
>     >
>     > Is there a way to get a log of the calls to the DVB adaptor driver?
>     >
>     > Thanks for any tips
>     >
>     > Ken
>     >
>     >
>     >
>     >
>     >
>     I haven't tried using a slave backend recently but remember that
>     you can
>     use a channel 'source' from the master. So if you haven't deleted
>     your
>     sources on master it should still work.
>
>     As an aside v32 supports SAT/IP. A Sat>IP tuner can be configured
>     in the
>     same way as a PCIe card based DVB tuner and has the same
>     capabilities,
>     such as scanning for channels, multirec and receiving EIT program
>     guide
>     information when that is present.  So any box that can run minisatip
>     (https://github.com/catalinii/minisatip/blob/master/README.md) can be
>     used as a networked interface to mythtv. I am currently running 2
>     DVB/S2
>     tuners on a Pi4 feeding a master mythtv on a NUC with no issues.
>
>
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>
>
>
> You can try one of the initial frequencies mentioned in the Wiki
> https://www.mythtv.org/wiki/Channel_Scanning#DVB-S2_Full_Scan_.28Tuned.29
> The first frequency, 10714000kHz, plus the other tuning parameters, 
> can be selected from the mythtv-setup menu if you use mythtv version 32.
>
> Klaas.
>
>
>
>
>
>
>
Thank you Klaas and John, much appreciated.

The sat/ip idea looks really interesting. I found the answer to my 
question just after I hit 'send' on this thread in the MythTV forum here 
-> https://forum.mythtv.org/viewtopic.php?t=3286 and subsequently found 
this specifically about 0.32 -> https://www.mythtv.org/wiki/Channel_Scanning

My two cards have scanned OK now. I just need to finish the 
configuration and test it.

Thanks - Ken

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